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. oh, look. that's modern history. >> coming right out of edward's air force base. >> the old and the new. >> yeah, that's it. >> now, let's look over here, at this. this isn't red. this is pink. >> okay, that's pink and that's from a pyroclastic volcanic explosion that happened many million years ago. and material blew out just like mount st. helens and-- >> so it's a huge, huge explosion. >> massive explosion and all this material flowed in here and then it settled down and solidified, and it's pink because it was a very foamy material, a very foamy air-filled material. >> wow. >> so that's why it's a different color from the black basalt that was a slow flow that came in later. >> and the red rock which is sandstone. >> sandstone that was at the bottom of the lakes. >> see, i'm learning my geology-- >> isn't it amazing? >> --pretty quickly. yeah, but i guess most people ask these same questions, don't they? >> absolutely, the same questions. they look at all of this and say "why, why, why?" and that's my job, is to explain to 'em how this happened and why it is the way it i
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